JPH0633931Y2 - Bedsore prevention bed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to bedsore prevention beds.

(Prior Art) Recently, with the advancement of medical technology, deaths due to diseases and accidents have been remarkably reduced, and lifespan has been dramatically extended.
At the same time, the number of bedridden sick people and elderly people tends to increase,
So-called bed sore prevention has become an important issue.

Conventionally, in this type of bedsore prevention bed, a plurality of two types of elastic columns are alternately arranged to form a bed surface, the body is supported by the elastic columns, and the two types of elastic columns are moved up and down separately. The one in which the pressure contact position of the body is changed (see JP-A-55-66898), a plurality of rod members are arranged in the bed, and the rod members are freely moved up and down to adjust the pressure contact position between the bed and the body. Those which are changed appropriately (Japanese Patent Laid-Open No. 52-52
-54289 gazette, Japanese Utility Model Laid-Open No. 61-45852 gazette, etc.), a plurality of rollers whose positions change horizontally in the bed surface are provided.
There is a roller in which the weight is received by the roller and the position where the roller is pressed against the body is appropriately changed by changing the position of the roller (see JP-A-57-173016).

(Problems to be solved by the invention) However, in the conventional bed slip prevention bed, a plurality of elastic columns or rods are arranged and these are vertically displaced, so in order to reliably prevent bed slip. It is necessary to mutually set the vertical displacement of each of the plurality of elastic columns or bars, and the displacement mechanism is complicated because the plurality of elastic columns or bars are individually displaced, resulting in a high cost. was there.

Further, in the conventional bedsore prevention bed, since the plurality of rollers are moved in the horizontal plane, there is a problem that the driving structure of the rollers becomes large and the cost also becomes high.

On the other hand, it is common to lay a mat or a mattress on the bed, but if there is a foreign substance under the mat, it is often experienced that it makes people feel uncomfortable and cannot get comfortable sleep. The bed slip prevention bed described in the conventional publication does not consider such a point, and in any state, a rod-shaped member or the like projects from the bed surface, and there is room for improvement in sleep comfort.

As disclosed in JP-A-58-94112, a method of vertically moving a plurality of rod-shaped members by an eccentric cam at individual timings, JP-A-64-28629 and JP-A-64-39721. As shown in the official gazette, a method is also known in which a plurality of supporting rods are arranged so as to extend in the lateral direction and each lateral rod is moved up and down. Was similar to.

In view of the above conventional problems, the present invention aims to provide a bed-shedding prevention bed capable of reliably preventing bed-shedding with a simple structure without causing a cost increase, and further providing comfortable sleep. To do.

(Means for Solving the Problem) Therefore, the bed slip prevention bed according to the present invention has at least one first bed surface between the frame portions of the bed body in which the front, rear, left and right legs are connected to each other by the frame portions. The first bed surface structure is formed by arranging a plurality of unit assemblies that can form a flat bed surface in the width direction of the bed body, and each unit assembly is a flat surface extending in the longitudinal direction of the bed body. The lower plate is arranged below the upper plate, and the front end and the rear end of both are elastically connected by an elastic member, and the upper plate extends substantially centrally in the longitudinal direction horizontally in the width direction of the bed body. While being swingably supported by a support shaft supported by the main body, a pair of front and rear rotary shafts rotatable by a drive source are disposed horizontally below the first bed surface structure body so as to extend horizontally in the width direction of the bed main body. However, multiple eccentric cams are installed on both rotary shafts, It is characterized in that it is provided in sliding contact with the front end portion or the rear end portion in the longitudinal direction, and the upper plates of the plurality of unit assemblies can be swung around the central support shaft at different timings.

In carrying out the present invention, at least one first bed surface structure, in which a plurality of unit assemblies each having an upper plate are arranged adjacent to each other in the width direction of the bed body, and at least one bed surface structure are provided. The upper plate is composed of at least one second bed surface structure which is arranged in the width direction of the bed body, and the plurality of rotation axes are each unit assembly of the first bed surface structure and the second bed surface structure. The eccentric cams, which are arranged on the lower side in the width direction of the bed main body, are provided on the respective rotary shafts, and the front end or rear end of each upper plate of each unit assembly of the first bed surface assembly, the second bed It is preferable that the left end or the right end of each upper plate of the surface structure is moved up and down at different timings.

The bed body may be made of any material, for example pipes, wood, etc. as is conventional.

Although the unit assembly of the first bed surface structure and the second bed surface structure may be composed of only the upper plate, the discomfort to the body is reduced and the pressure contact position between the bed surface and the body is smoothly changed. For this purpose, it is desirable to dispose a lower plate below the upper plate and with which the eccentric cam is in sliding contact with the lower surface, and elastically connect both plates with an elastic member.

The upper plate and the lower plate of the first and second bed surface structures may be formed of any material, for example, an iron plate or a wooden plate, and may be formed in any shape, for example, rectangular or elliptical. . Further, the elastic member may be any kind, for example, a coil spring, a leaf spring, a rubber member, etc., and any method for elastically supporting the upper plate and the lower plate, for example, upper or lower ends of the spring or the rubber member. A method of connecting the parts with bolts and nuts may be used.

The upper plate and the lower plate of the second bed surface structure may each be a single plate having a substantially full width in the width direction of the bed body, but of course, a plurality of upper plates and lower plates may be arranged in the width direction of the bed body. Good.

The displacement of the upper plate may be set in consideration of the thickness of the mat or the mattress, and may be set, for example, at 10 to 20 mm from the horizontal position.

The first bed surface structure and the second bed surface structure may be arranged adjacent to each other, or the first bed surface structure may be arranged adjacent to each other and the second bed surface structure is The body may be arranged at both ends or one end in the longitudinal direction of the bed body.

The rotating shaft can be supported on the legs or the frame of the bed body by the plate or the bracket.

The drive source may be of any configuration, such as a drive motor and reducer, a sprocket and chain, or a worm and worm wheel.

Although the bed surface structure is composed of both the first and second bed surface structures, it may be composed of only the first bed surface structure. The unit assembly may be entirely swung, but a specific one may be fixed and only a part may be swung.

In addition, the bed structure of the present invention can be adopted as the structure of the back and seat of the tatami mat, cushion, or vehicle seat in the room,
It can prevent numbness of the legs and body when sitting for a long time. In the past, if the racehorse broke down, there was no choice but to kill the drug, but if you use the bed structure of the present invention to support the horse body, you can treat the broken horse without killing the drug. Is what you can do.

(Operation and Effect of Invention) When the drive source is operated, the rotary shaft rotates each of the plurality of eccentric cams. Then, as a result of the eccentric cam swinging the upper plate of each unit assembly of the first bed surface assembly back and forth at different timings, each part of the bed surface moves up and down partially separately, and the pressure contact position between the body and the bed surface is increased. Can be changed, and bed sores of the body can be reliably prevented.

In addition, since the bed surface is composed of multiple plates and this is moved up and down by the eccentric cam, it can be moved up and down as compared with the case where the elastic columns and bars are displaced vertically or the rollers are moved horizontally. The displacement mechanism is extremely simple, and the floor slip can be reliably prevented only by adjusting the rotation angle of the eccentric cam. Further, when the unit assembly of the first bed surface structure and the second bed surface structure are composed of the upper plate, the lower plate and the elastic member, the driving force of the eccentric cam is not directly transmitted to the upper plate, and the displacement of the upper plate is changed. Becomes smooth.

On the other hand, when the user feels uncomfortable sleeping in the bed, the upper surface of the first bed surface structure can be configured to form a flat bed surface. Therefore, if the bed surface is returned to a flat state, a comfortable sleep is obtained. Is obtained.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. 1 to 5 show a bed slip prevention bed according to an embodiment of the present invention. In the figure, 1 is a bed body, and the bed body 1 is composed of a substantially U-shaped pipe front leg portion 10, left and right pipe rear end leg portions 11, a frame portion 12 and a side reinforcing rod 13. The front leg portion 10 and the rear leg portion 11 are fixed to the substantially central portion and the upper end portion of both ends of the frame portion 12, and to the lower portion thereof are fixed to both ends of the side reinforcing rod 13 by bolts, nuts or welding. Are interconnected by. A waist plate 14 is fixed to the side surface of the bed body 1 by bolts and nuts, and a caster 15 for movement is attached to the lower ends of the leg portions 10 and 11.

A fixing plate 20 forming a part of the bed surface 2 is fixed to the inner peripheral edge of the upper surface of the bed body 1 by bolts and nuts, and the remaining portion of the bed surface 2 includes three first bed surface structures 3 and 4. It is constituted by two second bed surface structures 4.

The first bed surface structures 3 are arranged at a predetermined distance from each other, and each of the plurality of unit assemblies 30 is arranged in the width direction of the bed body 1. Upper plate
31 and a lower plate 32, both ends of a spring member (elastic member) 33 are fixed to the both plates 31 and 32 by bolts, nuts, etc. Thus, the upper plate 31 and the lower plate 32 are spring members 33. It is elastically connected by. In addition, the plurality of unit assemblies
A support shaft 34 extending in the width direction of the bed body 1 is supported on the lower surface of each upper plate 31 of the bed 30, and both ends of the support shaft 34 are elastic members (not shown) on the frame 12 or the waist plate 14 of the bed body 1. The upper part of the upper plate 31 is absorbed by the upper plate 31.

On the other hand, each of the second bed surface structures 4 is disposed between or adjacent to the first bed surface structure 3 and each of the pair of left and right unit assemblies 40 is arranged in the width direction of the bed body 1. It is configured to be arranged in. Each of the unit assemblies 40 has an upper plate 41 and a lower plate 42, and both ends of a spring member (elastic member) 43 are fixed to the both plates 41, 42 by bolts and nuts, respectively. 41 and the lower plate 42 are elastically connected by a spring member 43. A support shaft 44 extending in the longitudinal direction of the bed body 1 is supported on the lower surface of each upper plate 41 of the pair of unit assemblies 40, and both ends of the support shaft 44 are the frame portion 12 of the bed body 1 or It is supported by a support bracket (not shown) on the waist plate 14 side through an elastic member (not shown), and thus absorbs the impact between the body and the upper plate 41.

In addition, the front end lower side and the rear end lower side of each unit assembly 30 of each of the plurality of first bed surface structures 3 and the lower center of each unit assembly 30 of the second bed surface structure 4 are respectively disposed. The rotating shaft 5 is arranged in the width direction of the bed body 1, while a bearing 50 is fixed to the side waist plate 14 of the bed body 1.
Both ends of the rotary shaft 5 are rotatably supported on the rotary shaft 5, and an eccentric cam 51 is provided on the rotary shaft 5. The eccentric cam 51 slides on the lower plates 32, 42 of the unit assemblies 30, 40. Are in contact with each other, and thus the rotation of the rotary shaft 5 causes the first bed surface structure 3 to move.
The front end and the rear end of the upper plate 31 of each unit assembly, and the left end and the right end of the upper plate 41 of each unit assembly 40 of the second bed surface structure 4 move up and down at mutually different timings. That is, it moves up and down in the opposite direction.

A drive shaft 60 is disposed below the bed surface structures 3 and 4 in the longitudinal direction of the bed body 1, and a plurality of worm wheels 61 are provided on the drive shaft 60 at predetermined intervals such as bolts. A worm 52 is fixed to the rotary shaft 5, the worm 52 and the worm wheel 61 are meshed with each other, and the other end of the drive shaft 60 is decelerated with a drive motor. And a drive source 62 that drives the rotary shaft 5 to rotate.
Is configured.

The side frame portion 12, the side reinforcement rod 13, the side waist plate 14 and the drive shaft 60 are each divided into three parts, and the side frame portion 12 and the side reinforcement rod 13 divided into the above three parts are The reinforcing rod is inserted into the inside and is connected to each other by bolts and nuts, and the drive shaft 60 divided into the above three parts is connected to each other by a universal joint or the like, thus making the bed easy to carry. It can be divided into three parts as a whole.

In addition, a mat or a mattress is generally placed on the bed surface 2. In this case, the upper plates 31, 41 are used.
It is desirable to adjust its thickness so that its displacement is transmitted to the body.

Next, the operation will be described. In the bed detent prevention bed, when the motor of the drive device 62 operates, the rotation of the motor is reduced by a reduction gear to a predetermined number of revolutions, for example, 1 to 2 times / minute, and transmitted to the drive shaft 60. The rotation is transmitted to each rotary shaft 5 via the worm wheel 61 and the worm 52, and each eccentric cam 51 of the rotary shaft 5 rotates.

Then, in each first bed surface structure 3, the front end and the rear end of the lower plate 32 of each unit assembly 30 are displaced in opposite directions, and the movement of the lower plate 32 to the upper plate 31 via the spring member 33. When transmitted, the front and rear ends of the upper plate 31 are displaced in opposite directions, respectively, so that the front and rear ends of the upper plate 31 of each unit assembly 30 of the three first bed surface structures 3 are displaced. Displaced, body and bed surface 2
Each pressure contact position in the longitudinal direction of and changes.

On the other hand, in each of the second bed surface structures 4, the left end and the right end of the lower plate 42 of each unit assembly 40 are displaced in opposite directions, and the movement is transmitted to the upper plate 41 via the spring member 43. As a result, the left end and the right end of the upper plate 41 are displaced in the opposite directions, and thus the left end and the right end of the upper plate 41 of each unit assembly 40 of the four second bed surface structures 4 are displaced, The left side surface, the right side surface or the center of the body and the bed surface 2 are in pressure contact with each other, so that the pressure contact position in the width direction changes.

Therefore, the first bed surface structure 3 changes each longitudinal pressure contact position between the body and the bed surface 2, and the second bed surface structure 4 changes each width direction pressure contact position between the body and the bed surface 2. Since it is changed, bed sores of the body can be reliably prevented.

Further, since the bed surface 2 is configured by using the plurality of plates 31, 32, 41, 42 and is moved up and down by the eccentric cam 51, the plates 31, 32 are configured with a small number of the rotating shaft 5 and the eccentric cam 51. ,
41 and 42 can be displaced, and when vertically moving the elastic column or bar as in the conventional case, the vertical displacement mechanism can be made extremely simple compared to the case where the roller is moved horizontally, resulting in high cost. Nor.

Further, since the plurality of plates 31, 32, 41, 42 are moved up and down by the eccentric cam 51, the floor slip can be surely prevented by adjusting the rotation angle of the eccentric cam 51, and the adjustment can be performed very easily. .

Further, since the end portions of the plurality of plates 31, 32, 41, 42 are moved up and down to change the pressure contact position, it is possible to perform massage at the same time as bed slip. At that time, in order to perform massage efficiently, it is desirable to set the shape of each upper plate 31, 41 well.For example, a ball is arranged on the surface of the upper plates 31, 41 via an elastic member, and the body is held by the ball. It may be pressed.

6 and 7 show another embodiment of the present invention,
In the figure, the same reference numerals as those in FIGS. 1 to 5 indicate the same or corresponding portions as those in the figures. In the present embodiment, the front end and the rear end of each upper plate 31 of the unit assembly 30 of the first bed surface structure 3 are supported by the wires 35 extending in the width direction of the bed body 1, and the first bed surface is also supported. The left end and the right end of the side end upper plate 31 of the unit assembly 30 of the structure 3 and the left end and the right end of the upper plate 41 of the unit assembly 40 of the second bed bed surface structure 4 are the longitudinal sides of the bed body 1. One plate 41, 42 which is supported by a wire 45 extending in the width direction and which also extends the second bed surface structure 4 in the width direction.
Further, the sprocket 62 and the chains 63, 64 constitute a driving force transmission mechanism for the driving source 6.

Since the operation and effect of this embodiment are the same as those of the above embodiment, detailed description thereof will be omitted.

[Brief description of drawings]

1 is a schematic perspective view showing a bed-shedding prevention bed according to an embodiment of the present invention, FIG. 2 is a schematic side view showing the bed-shedding prevention bed, and FIG. 3 is a first view of the bed-shedding prevention bed.
FIG. 4 is a schematic side view showing a unit assembly 30 of the bed surface structure 3, FIG. 4 is a schematic configuration view showing a transmission mechanism of the drive source 6 in the bed sill prevention bed, and FIG. 5 is a second bed surface in the bed sill prevention bed. FIG. 6 is a schematic side view showing the structure 4, and FIGS. 6 and 7 are a schematic side view and a schematic plan view showing another embodiment of the present invention, respectively. 1 …… Bed body, 10 …… Front leg, 11 …… Rear leg, 12…
… Frame part, 2 …… Bed surface, 3 …… First bed surface structure,
30 …… Unit assembly, 31 …… Upper plate, 31 …… Lower plate, 32 …… Spring member (elastic member), 4 …… Second bed surface assembly, 41…
… Upper plate, 42 …… Lower plate, 42 …… Spring member (elastic member), 5
…… Rotary shaft, 51 …… Eccentric cam, 6 …… Drive source.

Claims (2)

[Scope of utility model registration request] 1. At least one first bed surface structure is provided between the frame parts of a bed body in which front, rear, left and right legs are interconnected by a frame part, and the first bed surface structure is A plurality of unit assemblies that can form a flat bed surface are arranged in the width direction of the bed body, and each unit assembly has a lower plate below a flat upper plate extending in the longitudinal direction of the bed body. The front plate and the rear plate are elastically connected to each other by elastic members, and the upper plate swings by a support shaft supported by the bed main body such that its substantially central portion in the longitudinal direction extends horizontally in the width direction of the bed main body. On the other hand, a pair of front and rear rotating shafts rotatable by a drive source are arranged horizontally extending in the width direction of the bed main body under the first bed surface structure, and are supported by both the rotating shafts. Is a plurality of eccentric cams on the lower surface of the lower plate. A bed slip prevention bed characterized in that it is provided in sliding contact with an end portion, and the upper plates of each of the plurality of unit assemblies can swing around a central support shaft at different timings. 2. At least one second bed surface structure that can form a flat bed surface is arranged before and after the first bed surface structure in the longitudinal direction of the bed body, and the second bed surface structure is The lower plate is arranged below a flat upper plate extending in the width direction of the bed body, and both widthwise end portions of the upper plate are elastically connected by elastic members. The upper plate has a substantially central portion in the width direction. Is horizontally swingably supported by a support shaft extending horizontally in the width direction of the bed body, while a rotation shaft rotatable by a drive source is provided under the second bed surface structure body of the bed body. It is arranged to extend horizontally in the width direction,
A plurality of eccentric cams are provided on the rotating shaft in sliding contact with both ends of the lower surface of the lower plate in the width direction of the bed body, and the upper plate of the second bed surface structure is swingable around the central support shaft. The bedsore prevention bed according to claim 1.